package com.topgay.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.ModelAndViewDefiningException;

import com.topgay.domain.ValueStrings;

/**
 * @author Harry
 *
 */
public class AdminLoginCheckInterceptor implements HandlerInterceptor{

	@Override
	//view 처리 종료 후에 호출
	//3. Object - Handler 메소드(HandlerMethod)
	//4. Exception - 발생한 오류
	public void afterCompletion(HttpServletRequest request,
			HttpServletResponse response, Object handler, Exception e)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response,
			Object handler, ModelAndView mv) throws Exception {
//		System.out.println("[postHandle]");
		response.setHeader("cache-control", "no-store, no-cache");
//		response.setHeader("Cache-Control", "no-cache, no-stroe, must-revalidate"); // HTTP 1.1.
//		response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
//		response.addDateHeader("Expires", 0); // Proxies.
		
	}

	@Override
	//Handler처리 전에 호출
	//return boolean : false 리턴 -> 다음으로 이동하지 않는다.
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
			Object handler) throws Exception {
//		System.out.println("[preHandle]");
		HttpSession session = request.getSession();
		Object loginAdminInfo = session.getAttribute("login_admin_info");
		if(loginAdminInfo == null){
			ModelAndView mv = new ModelAndView("/admin/body/login.jsp", "error_msg", ValueStrings.getInstance().getErrorMsgLogin());
			throw new ModelAndViewDefiningException(mv);
		}
		return true;
	}
	
}
